diff options
Diffstat (limited to 'drivers/gpu/drm/exynos/exynos_drm_fimd.c')
-rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_fimd.c | 263 |
1 files changed, 120 insertions, 143 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_fimd.c b/drivers/gpu/drm/exynos/exynos_drm_fimd.c index 1c263dac3c1c..868a14d52995 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fimd.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fimd.c @@ -16,10 +16,12 @@ #include <linux/kernel.h> #include <linux/platform_device.h> #include <linux/clk.h> +#include <linux/of.h> #include <linux/of_device.h> #include <linux/pm_runtime.h> #include <video/of_display_timing.h> +#include <video/of_videomode.h> #include <video/samsung_fimd.h> #include <drm/exynos_drm.h> @@ -35,6 +37,8 @@ * CPU Interface. */ +#define FIMD_DEFAULT_FRAMERATE 60 + /* position control register for hardware window 0, 2 ~ 4.*/ #define VIDOSD_A(win) (VIDOSD_BASE + 0x00 + (win) * 16) #define VIDOSD_B(win) (VIDOSD_BASE + 0x04 + (win) * 16) @@ -65,11 +69,13 @@ struct fimd_driver_data { unsigned int has_shadowcon:1; unsigned int has_clksel:1; + unsigned int has_limited_fmt:1; }; static struct fimd_driver_data s3c64xx_fimd_driver_data = { .timing_base = 0x0, .has_clksel = 1, + .has_limited_fmt = 1, }; static struct fimd_driver_data exynos4_fimd_driver_data = { @@ -90,6 +96,7 @@ struct fimd_win_data { unsigned int fb_width; unsigned int fb_height; unsigned int bpp; + unsigned int pixel_format; dma_addr_t dma_addr; unsigned int buf_offsize; unsigned int line_size; /* bytes */ @@ -115,11 +122,10 @@ struct fimd_context { wait_queue_head_t wait_vsync_queue; atomic_t wait_vsync_event; - struct exynos_drm_panel_info *panel; + struct exynos_drm_panel_info panel; struct fimd_driver_data *driver_data; }; -#ifdef CONFIG_OF static const struct of_device_id fimd_driver_dt_match[] = { { .compatible = "samsung,s3c6400-fimd", .data = &s3c64xx_fimd_driver_data }, @@ -129,21 +135,14 @@ static const struct of_device_id fimd_driver_dt_match[] = { .data = &exynos5_fimd_driver_data }, {}, }; -#endif static inline struct fimd_driver_data *drm_fimd_get_driver_data( struct platform_device *pdev) { -#ifdef CONFIG_OF const struct of_device_id *of_id = of_match_device(fimd_driver_dt_match, &pdev->dev); - if (of_id) - return (struct fimd_driver_data *)of_id->data; -#endif - - return (struct fimd_driver_data *) - platform_get_device_id(pdev)->driver_data; + return (struct fimd_driver_data *)of_id->data; } static bool fimd_display_is_connected(struct device *dev) @@ -157,7 +156,7 @@ static void *fimd_get_panel(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); - return ctx->panel; + return &ctx->panel; } static int fimd_check_mode(struct device *dev, struct drm_display_mode *mode) @@ -237,8 +236,8 @@ static void fimd_apply(struct device *subdrv_dev) static void fimd_commit(struct device *dev) { struct fimd_context *ctx = get_fimd_context(dev); - struct exynos_drm_panel_info *panel = ctx->panel; - struct fb_videomode *timing = &panel->timing; + struct exynos_drm_panel_info *panel = &ctx->panel; + struct videomode *vm = &panel->vm; struct fimd_driver_data *driver_data; u32 val; @@ -250,22 +249,22 @@ static void fimd_commit(struct device *dev) writel(ctx->vidcon1, ctx->regs + driver_data->timing_base + VIDCON1); /* setup vertical timing values. */ - val = VIDTCON0_VBPD(timing->upper_margin - 1) | - VIDTCON0_VFPD(timing->lower_margin - 1) | - VIDTCON0_VSPW(timing->vsync_len - 1); + val = VIDTCON0_VBPD(vm->vback_porch - 1) | + VIDTCON0_VFPD(vm->vfront_porch - 1) | + VIDTCON0_VSPW(vm->vsync_len - 1); writel(val, ctx->regs + driver_data->timing_base + VIDTCON0); /* setup horizontal timing values. */ - val = VIDTCON1_HBPD(timing->left_margin - 1) | - VIDTCON1_HFPD(timing->right_margin - 1) | - VIDTCON1_HSPW(timing->hsync_len - 1); + val = VIDTCON1_HBPD(vm->hback_porch - 1) | + VIDTCON1_HFPD(vm->hfront_porch - 1) | + VIDTCON1_HSPW(vm->hsync_len - 1); writel(val, ctx->regs + driver_data->timing_base + VIDTCON1); /* setup horizontal and vertical display size. */ - val = VIDTCON2_LINEVAL(timing->yres - 1) | - VIDTCON2_HOZVAL(timing->xres - 1) | - VIDTCON2_LINEVAL_E(timing->yres - 1) | - VIDTCON2_HOZVAL_E(timing->xres - 1); + val = VIDTCON2_LINEVAL(vm->vactive - 1) | + VIDTCON2_HOZVAL(vm->hactive - 1) | + VIDTCON2_LINEVAL_E(vm->vactive - 1) | + VIDTCON2_HOZVAL_E(vm->hactive - 1); writel(val, ctx->regs + driver_data->timing_base + VIDTCON2); /* setup clock source, clock divider, enable dma. */ @@ -396,6 +395,7 @@ static void fimd_win_mode_set(struct device *dev, win_data->fb_height = overlay->fb_height; win_data->dma_addr = overlay->dma_addr[0] + offset; win_data->bpp = overlay->bpp; + win_data->pixel_format = overlay->pixel_format; win_data->buf_offsize = (overlay->fb_width - overlay->crtc_width) * (overlay->bpp >> 3); win_data->line_size = overlay->crtc_width * (overlay->bpp >> 3); @@ -417,39 +417,38 @@ static void fimd_win_set_pixfmt(struct device *dev, unsigned int win) val = WINCONx_ENWIN; - switch (win_data->bpp) { - case 1: - val |= WINCON0_BPPMODE_1BPP; - val |= WINCONx_BITSWP; - val |= WINCONx_BURSTLEN_4WORD; - break; - case 2: - val |= WINCON0_BPPMODE_2BPP; - val |= WINCONx_BITSWP; - val |= WINCONx_BURSTLEN_8WORD; - break; - case 4: - val |= WINCON0_BPPMODE_4BPP; - val |= WINCONx_BITSWP; - val |= WINCONx_BURSTLEN_8WORD; - break; - case 8: + /* + * In case of s3c64xx, window 0 doesn't support alpha channel. + * So the request format is ARGB8888 then change it to XRGB8888. + */ + if (ctx->driver_data->has_limited_fmt && !win) { + if (win_data->pixel_format == DRM_FORMAT_ARGB8888) + win_data->pixel_format = DRM_FORMAT_XRGB8888; + } + + switch (win_data->pixel_format) { + case DRM_FORMAT_C8: val |= WINCON0_BPPMODE_8BPP_PALETTE; val |= WINCONx_BURSTLEN_8WORD; val |= WINCONx_BYTSWP; break; - case 16: + case DRM_FORMAT_XRGB1555: + val |= WINCON0_BPPMODE_16BPP_1555; + val |= WINCONx_HAWSWP; + val |= WINCONx_BURSTLEN_16WORD; + break; + case DRM_FORMAT_RGB565: val |= WINCON0_BPPMODE_16BPP_565; val |= WINCONx_HAWSWP; val |= WINCONx_BURSTLEN_16WORD; break; - case 24: + case DRM_FORMAT_XRGB8888: val |= WINCON0_BPPMODE_24BPP_888; val |= WINCONx_WSWP; val |= WINCONx_BURSTLEN_16WORD; break; - case 32: - val |= WINCON1_BPPMODE_28BPP_A4888 + case DRM_FORMAT_ARGB8888: + val |= WINCON1_BPPMODE_25BPP_A1888 | WINCON1_BLD_PIX | WINCON1_ALPHA_SEL; val |= WINCONx_WSWP; val |= WINCONx_BURSTLEN_16WORD; @@ -746,45 +745,54 @@ static void fimd_subdrv_remove(struct drm_device *drm_dev, struct device *dev) drm_iommu_detach_device(drm_dev, dev); } -static int fimd_calc_clkdiv(struct fimd_context *ctx, - struct fb_videomode *timing) +static int fimd_configure_clocks(struct fimd_context *ctx, struct device *dev) { - unsigned long clk = clk_get_rate(ctx->lcd_clk); - u32 retrace; - u32 clkdiv; - u32 best_framerate = 0; - u32 framerate; - - retrace = timing->left_margin + timing->hsync_len + - timing->right_margin + timing->xres; - retrace *= timing->upper_margin + timing->vsync_len + - timing->lower_margin + timing->yres; - - /* default framerate is 60Hz */ - if (!timing->refresh) - timing->refresh = 60; - - clk /= retrace; - - for (clkdiv = 1; clkdiv < 0x100; clkdiv++) { - int tmp; - - /* get best framerate */ - framerate = clk / clkdiv; - tmp = timing->refresh - framerate; - if (tmp < 0) { - best_framerate = framerate; - continue; - } else { - if (!best_framerate) - best_framerate = framerate; - else if (tmp < (best_framerate - framerate)) - best_framerate = framerate; - break; + struct videomode *vm = &ctx->panel.vm; + unsigned long clk; + + ctx->bus_clk = devm_clk_get(dev, "fimd"); + if (IS_ERR(ctx->bus_clk)) { + dev_err(dev, "failed to get bus clock\n"); + return PTR_ERR(ctx->bus_clk); + } + + ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd"); + if (IS_ERR(ctx->lcd_clk)) { + dev_err(dev, "failed to get lcd clock\n"); + return PTR_ERR(ctx->lcd_clk); + } + + clk = clk_get_rate(ctx->lcd_clk); + if (clk == 0) { + dev_err(dev, "error getting sclk_fimd clock rate\n"); + return -EINVAL; + } + + if (vm->pixelclock == 0) { + unsigned long c; + c = vm->hactive + vm->hback_porch + vm->hfront_porch + + vm->hsync_len; + c *= vm->vactive + vm->vback_porch + vm->vfront_porch + + vm->vsync_len; + vm->pixelclock = c * FIMD_DEFAULT_FRAMERATE; + if (vm->pixelclock == 0) { + dev_err(dev, "incorrect display timings\n"); + return -EINVAL; } + dev_warn(dev, "pixel clock recalculated to %luHz (%dHz frame rate)\n", + vm->pixelclock, FIMD_DEFAULT_FRAMERATE); } + ctx->clkdiv = DIV_ROUND_UP(clk, vm->pixelclock); + if (ctx->clkdiv > 256) { + dev_warn(dev, "calculated pixel clock divider too high (%u), lowered to 256\n", + ctx->clkdiv); + ctx->clkdiv = 256; + } + vm->pixelclock = clk / ctx->clkdiv; + DRM_DEBUG_KMS("pixel clock = %lu, clkdiv = %d\n", vm->pixelclock, + ctx->clkdiv); - return clkdiv; + return 0; } static void fimd_clear_win(struct fimd_context *ctx, int win) @@ -876,59 +884,53 @@ static int fimd_activate(struct fimd_context *ctx, bool enable) return 0; } +static int fimd_get_platform_data(struct fimd_context *ctx, struct device *dev) +{ + struct videomode *vm; + int ret; + + vm = &ctx->panel.vm; + ret = of_get_videomode(dev->of_node, vm, OF_USE_NATIVE_MODE); + if (ret) { + DRM_ERROR("failed: of_get_videomode() : %d\n", ret); + return ret; + } + + if (vm->flags & DISPLAY_FLAGS_VSYNC_LOW) + ctx->vidcon1 |= VIDCON1_INV_VSYNC; + if (vm->flags & DISPLAY_FLAGS_HSYNC_LOW) + ctx->vidcon1 |= VIDCON1_INV_HSYNC; + if (vm->flags & DISPLAY_FLAGS_DE_LOW) + ctx->vidcon1 |= VIDCON1_INV_VDEN; + if (vm->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) + ctx->vidcon1 |= VIDCON1_INV_VCLK; + + return 0; +} + static int fimd_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct fimd_context *ctx; struct exynos_drm_subdrv *subdrv; - struct exynos_drm_fimd_pdata *pdata; - struct exynos_drm_panel_info *panel; struct resource *res; int win; int ret = -EINVAL; - if (dev->of_node) { - pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) { - DRM_ERROR("memory allocation for pdata failed\n"); - return -ENOMEM; - } - - ret = of_get_fb_videomode(dev->of_node, &pdata->panel.timing, - OF_USE_NATIVE_MODE); - if (ret) { - DRM_ERROR("failed: of_get_fb_videomode() : %d\n", ret); - return ret; - } - } else { - pdata = dev->platform_data; - if (!pdata) { - DRM_ERROR("no platform data specified\n"); - return -EINVAL; - } - } - - panel = &pdata->panel; - if (!panel) { - dev_err(dev, "panel is null.\n"); - return -EINVAL; - } + if (!dev->of_node) + return -ENODEV; ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); if (!ctx) return -ENOMEM; - ctx->bus_clk = devm_clk_get(dev, "fimd"); - if (IS_ERR(ctx->bus_clk)) { - dev_err(dev, "failed to get bus clock\n"); - return PTR_ERR(ctx->bus_clk); - } + ret = fimd_get_platform_data(ctx, dev); + if (ret) + return ret; - ctx->lcd_clk = devm_clk_get(dev, "sclk_fimd"); - if (IS_ERR(ctx->lcd_clk)) { - dev_err(dev, "failed to get lcd clock\n"); - return PTR_ERR(ctx->lcd_clk); - } + ret = fimd_configure_clocks(ctx, dev); + if (ret) + return ret; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); @@ -952,10 +954,6 @@ static int fimd_probe(struct platform_device *pdev) } ctx->driver_data = drm_fimd_get_driver_data(pdev); - ctx->vidcon0 = pdata->vidcon0; - ctx->vidcon1 = pdata->vidcon1; - ctx->default_win = pdata->default_win; - ctx->panel = panel; DRM_INIT_WAITQUEUE(&ctx->wait_vsync_queue); atomic_set(&ctx->wait_vsync_event, 0); @@ -973,12 +971,6 @@ static int fimd_probe(struct platform_device *pdev) pm_runtime_enable(dev); pm_runtime_get_sync(dev); - ctx->clkdiv = fimd_calc_clkdiv(ctx, &panel->timing); - panel->timing.pixclock = clk_get_rate(ctx->lcd_clk) / ctx->clkdiv; - - DRM_DEBUG_KMS("pixel clock = %d, clkdiv = %d\n", - panel->timing.pixclock, ctx->clkdiv); - for (win = 0; win < WINDOWS_NR; win++) fimd_clear_win(ctx, win); @@ -1067,20 +1059,6 @@ static int fimd_runtime_resume(struct device *dev) } #endif -static struct platform_device_id fimd_driver_ids[] = { - { - .name = "s3c64xx-fb", - .driver_data = (unsigned long)&s3c64xx_fimd_driver_data, - }, { - .name = "exynos4-fb", - .driver_data = (unsigned long)&exynos4_fimd_driver_data, - }, { - .name = "exynos5-fb", - .driver_data = (unsigned long)&exynos5_fimd_driver_data, - }, - {}, -}; - static const struct dev_pm_ops fimd_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(fimd_suspend, fimd_resume) SET_RUNTIME_PM_OPS(fimd_runtime_suspend, fimd_runtime_resume, NULL) @@ -1089,11 +1067,10 @@ static const struct dev_pm_ops fimd_pm_ops = { struct platform_driver fimd_driver = { .probe = fimd_probe, .remove = fimd_remove, - .id_table = fimd_driver_ids, .driver = { .name = "exynos4-fb", .owner = THIS_MODULE, .pm = &fimd_pm_ops, - .of_match_table = of_match_ptr(fimd_driver_dt_match), + .of_match_table = fimd_driver_dt_match, }, }; |